Michigan Proof of Service is a document that a party must submit to the court to verify that the other party has been served with copies of legal documents. It is a required element of due process in the Michigan court system. There are two types of Michigan Proof of Service: Personal Service and Constructive Service. Personal Service occurs when a court-appointed individual physically hands a copy of the document to the other party. Constructive Service occurs when the legal document is sent to the other party by certified mail, and a return receipt is obtained. Both types of Michigan Proof of Service must be filed with the court within 28 days of service.